2x^2-√2x-30=0可转换为(√2^2)x^2-√2x-30=0(√2x+5)(√2x-6)=0√2x+5=0,x=-5/√2=-5√2/2√2x-6=0,x=6/√2=3√2答案为：x1=-5√2/2,x2=3√2
2x^2-x√2-30=0，△=2+8*30=242=2*11^2，x1=3√2，x2=-5(√2)/2.
